Battery drain with the smart cover?

[mavande6874]

I've had a big battery drain with my XZ, 10 to 15% in the first two hours of the day after a full charge.

Now with the original smart cover removed the drain is 2%!!!!!

Also the power usage of the smart cover is not listed in the diagram.... could this be the battery problem with nougat?

[mavande6874]

After the factory reset it seemed to work normal. 

But now it's starting all over again... Also noticed that I'm now on 7.0 instead of 7.1.1. 

Is the update revoked?